Internal-combustion engine



E. G. HOLTHAUS,

ENTERNAL COMBUSTION ENGINE.

APPLICATION FILED APR. 1, I920.

Pammed Nov 23, 19%

P a it ti ELMO G. HOLTHAUS, 035 ST. LOUIS, MISSOUEI.

INTERNAL-COMBUSTION ENGINE.

Application filed April 1, 1920. Serial No. 370,431

To all whom it may concern Be it known that I, ELMo G. HoLTrrAUs, t citizen of the Jnited States, residing at St. Louis, State of Missouri, have invented :ertain new and useful Improvements in internal-Combustion Engines, oi which the following is a full, clear, and exact descrip- ;ion, reference being had to the accompany- .ng drawings, forming a part hereof.

The present invention has relation to .im rovements in internal combustion engines, icing particularly directed to the cylinder dock ot the engine and the cylinder theretor. The object of the invention is to provide a block with removable cylinders so ;hat in the event any cylinder needs repair- 11;;- or the piston packing therefor requires "enewal, said cylinder may be witlnlrawn From the block upon removal of the cylinder Itltl without disturbing any other cylinder )l the series, where a plurality oi cylinders employed. A further object is to provide a simple construction by which a cyl- .nder is secured in position in the block; to rovide the cylinder with means for guiding LhereintQ the packing rings carried by the piston during the insertion of the piston into Lhe cylinder when the latter is being restored its position in the blocr; and finally to qro'vide a block and cylinders therefor which nay be applied to any prevailing type of .nternal combustion engine without entail .ng any material changes of construction in ;he latter, all as will be clearly apparent trom the following detailed description of he invention in connection with the accom- Janying drawings in which-- Figure 1 represents a top plan of the :ylinder block; Fig. 2 is a middle longitudiial section of the same taken lengthwise of .he cylinders; Fig. 3 is-an enlarged longi- ;udinal sectional detail of the inner end of t cylinder showing the manner of passing he piston with its packing rings into the :ylinder; 4cis a perspective of the screw hing tor i'ast hing; cylinder, a part of the fing being broken away; Fig. 5 is a cross iection on a smaller scale through one of ;he cylinders taken at right angles to the iection shown in Fig. 2; and Fig. 6 is de- 1ached plan of the piston and its connecting .od.

Referring to the drawings, 1, represents L hollow or chambered cylinder-block cast integrally with the upper section of the crank-case 2, the bottom and top walls of the block being provided with a plurality oi openings 0, 0', respectively, said openings being disposed in pairs concentrically about common axes for the reception of a series of removable sylinders C, each cylinder being provided with a retaprocatingz piston P equipped with split metal packing rings p conlined in the usual peripheral annular grooves 71/ of the piston as well under stood in the art. The c anlr-shaft S of the engine traverses the crank-case 2, the crank arms 3 of the shaft being connected to the several pistons by the connecting rods L,

the pistons operating in pairsas indicated inthe drawings wherein the parts last alluded to follow the general design of such parts 111 engine construction. in the present improvement however the strap a encircling the crank-pin 5 is coupled to the'connecting red by a bolt 7) passed through the.

tongue i; of the connecting rod and the walls oi: the recess by which the tongue is re ceived, termed in the adjacent section or" the strap. As obvious from the drawings, by pull ng out the bolt 6 the piston with its connecting rod may be detached from the strap, thereby permitting access to the bolts 0 whenever it becomes necessary to tighten the strap to the crank pin. in the present embodiment of my invention the bottom wall of the block forms the dividing" wall or partition between the chamber of the block and the crank case.

As pointed out above,-the bottom wall of the block is provided with a series of openings 0, said openings taperin inwardly or toward the crank case, the inclined walls of said openings forming seats for the inner tapered or beveled ends of the cylinders. Zihe openings 0 in the top wall of the block on the other hand, are bounded by threaded cylindrical walls to which a e screwed the screw cylinder rings ('5, the latter having inner outwardly tapering walls for engaginnthe beveled outer terminals of the cvlindcr, a cylinder when once in place being:, held tightly to its seat by the clamping action of the ring 6, the sloping contacting surit'aces between the cylinder and its seat and between the cylinder ring and the cylinder forming water-tight joints so that no packing or gaskets are necessary to prevent paohing rin Janna: be compressed.

leakage. The rings (3 when fully driyen home are set-screwed against unscrewing by he screws 7 driven through the side wall of the block (Fig. i). To remov a cylinder it any time, all that need be done is to loosen a not screw 7, and unscrew the ring (5 (the ring being provided with depression; (Z for lho insertion of the lingers oi a suitable wrench) thus leaving the cylinder free to be pulled out through the lop ol. the block. Of rourae, the cylinder 11 :ad ll, with which the present invent-ion however not concerned, ninat first be detached from the block to iin access to the cylinders. The openings U are of slightly larger diameter than the openings C and larger than the outside diameters of the cylinders, so that when any ring 6 is removed, it leaves the cylilnler free to be withdrawn through the opening i) without binding or lfriction. l he oylind are surrounded by a water-jacket W formed in the block: through which circulation is established by any of the usual methods linown to the art.

The inner end oi? the bore of ea :11 cylinder tern'iinates' in an outwardly flaring portion (2 the purpose of which is to guide the 2) into the eyliniiler by gradually compressing or oi:ntraotin;- the ringe during the insertion oi the piston (in the crank case) back into the cylinder when the latter is restored to bloolr, Thus, in Fig. 3. it will be seen that the parking rings carried by the platen expand or oprn out their lull extent when liree or out oil the oylinder; and to restore them to the ylinder they This conn rcssion is done antoniatimily by the gradually oontraoting walls of the lilaring portion. a l'he piaton. is pushed into the o'ylinden li eatnros shown but not alluded to are well understood in the art, and being :lorei rn to the present invention. no doocription thereof is herein. attempted.

Having described my invention what l claim is:

1. ln wnibination wiih a cylinder bloch chambered for the ciruilation or a cooling: medium, a cranks-a e, a dividing wall or partition between the crank-case and block, said wall and the wall opposite thereto being); i 'oyided with openings diapoeted in pairs about concentric axes, a cylinder insertihle into each pair oi openings, the ails of the openings in the partition. wall aforesaid tapering toward the crankcase and the cylinder haying correspondingly tapered inner ends for seating against said walls, and means interposed between the opposite or outer ends of the cylinders and the wills ol' the openings receiving the same for seour-- ing the cylinders to the block.

2. In combination with a hollow cylinder block for internal coinbuation engines having a lop wall and a bottom wall, a crankcase separatml therefrom by the bottom wall, the walls aforesaid being provided with openings disposed in pairs concentrcally about common axes, the walls of the inner openings tapering toward the crank case, a cylinder inserted into eaeh pair oi openings and lnirinp; tapering ends, the inncr end being seated against the sloping walls ol. the inner opening, a screw ring; screwed into the opening oil the top wall and provided with inner outwardly taporinn walls operating to engage the outer ta pered end ol? the cylinder, whereby the eylinder is looked in position in the blo k and the sloping contacting surlaoeis ol the say-- on] formations are ln'ouo'ht into iirni on gageinent to form watertight joints.

in testimony whereof I allix lny signatnro in. presence olf two Witnesses.

ELIE PLO G. llOLlllAllfil.

Witheases EMIL STA inn, Joe. A. lilronnn, 

